摘要
本文提出了一种新的DSSS系统自适应干扰抑制方案。针对Wigner-Ville分布的不足,采用WHT来分析接收信号,并从中提取干扰瞬时频率以设计时变IIR滤波器。和通常采用的线性相位FIR滤波器相比,IIR滤波器具有理想的点阻特性。仿真结果证实IIR滤波器的BER性能好于FIR滤波器。
In this paper, a novel scheme of interference mitigation in DSSS is proposed. To overcome the shortcoming of Wigner-Ville distribution, we adopt-WHT analyzing received signal and measuring the instantaneous frequency of interference to design time-varying IIR filter. The IIR filter has ideal characteristic compared with FIR filter with linear angle. The results of computer simulation show the BER of IIR filter is lower than that of FIR filter.
出处
《信号处理》
CSCD
2004年第4期353-355,419,共4页
Journal of Signal Processing
基金
战术抗干扰国防重点实验室:00JS04.7.1DZ2001
